Improvement in spark arresters and extinguishers for locomotives



.i. W. GRAY. Spark-Arresters and Extinguishers for Locomotives.

No. 139,002. PatentedMay 20.1873.

Min 040% 4. 15a we n tor UNITED STATES PATENT OFFICE.

JOHN W. GRAY, OF HARRISBURG, PENNSYLVANIA.

IMPROVEMENT IN SPARK ARRESTERS AND EXTINGUISHERS FOR LOCOMOTIVES.

Specification forming part of Letters Patent No. 139,002, dated May 20, 1873; application filed February 25, 1873.

To all whom it may concern:

Be it known that I, JOHN W. GRAY, of the.

peculiarly-constructed spark-arrestin g device,

that is combined with a spark-discharging pipe, into which a jet of steam or water is introduced, so that the said sparks shall be continuously conveyed from the smoke-stack to the ground and thoroughly extinguished before reaching the same, substantially as is hereinafter set forth and described.

In the drawing, Figure 1 represents a side elevation, in perspective, of the smoke-stack, showing the position of the discharging-pipe in relation to it. and the boiler of the engine. Fig. 2 is a side elevation in section of the smoke-stack and discharge-pipe. Fig. 3 is a perspective view of the bonnet or spark-arrester, representing it in a reversed position. Fig. 4. is a top view of the stack, showing the arrester in position.

In Figs. 1 and 2, A represents the body of the stack. In form it is similar to those in common use, being flared or widened from the base to the top, as is shown 5 it is surrounded by the spark-arrester F. (See Figs. 2, 3, and 4.) Said arrester is constructed as follows: A circular disk or plate of metal is furnished with the radial projections l 2 3, that are intended to retain it inposition upon the stack. Upon the under side of the disk and concentric with its outer edge a cone, i, is formed'or fastened.

formed. The lift or draft pipe I is fastened by its lower end to the base of the stack in position concentric to the wall of the stack. It

is made of sufficient length, in proportion to the height of the stack A, to properly direct the spark-blast against the point or apex of the cone '6. Encircling the blast or draft pipe I, and near its lower end, an elliptic disk of metal, a n, is fastened, whose outer edge bears against the inner side of the stack A, and is secured thereto. At the lowest point of contact of said disk with the wall of the stack a perforation is made in said wall for the reception of the conveying-pipe 0'. (See Figs. 1 and 2.) This pipe 0 is intended to convey away or discharge the sparks as they are thrown down by the arrester F. At a proper point on the pipe 0 a perforation is made of sufficient size to receive the steam-pipe I). (See Figs. 1 and 2.) This pipe has its end that is inserted in the pipe 0 bent so as to take the direction of said pipe, as is shown in Fig. 2; its other end is secured in connection with a steam-cock, c, that is tapped into or other-' wall and the sparks are arrested and thrown down into the stack between the draft-pipe I and the wall of the stack. They are then 0011- veyed down the pipe 0, and, coming in contact with the jet of steam or water, are extinguished perfectly before they are deposited upon the ground. The steam-cook 0 may be given sucha position aslto permit the use of both water and steam, if desired and found necessary.

I do notzdesire to broadly claim the use of a discharge-pipe O, as attached to the base of a stack, as I am aware that such a device has been employed to relieve the stack by attaching iii-temporarily at stations. Neither do I draft-pipe I, inclined disk 02 n, discharge-pipe claim the perforated wall 0 0, broadly; but G,stea1n-pipe b, and cock 0, as and for the What I do claim as new of my invention, purpose described.

' and desire to secure by Letters Patent of the JOHN W. GRAY. [L- S.]

United States, is-- Witnesses:

The combination of the arrester F, oon- H. SHELLENBERGER,

structed as set forth, in combination with the WM. P. PATTON. 

